The Guardian article of Feb 7th appears to talk at length about something that happened in 1973. It (article) is quite convoluted but it looks like the Queen was trying to preserve her privacy as she perceived it at the time, perhaps in a heavy handed way.

From the other Guardian article:

"The number of tenants on Scilly caught by the exemption is not known but has been estimated at 100.

One of them is a 78-year-old retired oil executive, Alan Davis. He has been prevented from buying the freehold to his 1960s bungalow."

The Royal Family may not be to your taste but these two articles are hardly grounds for insurrection.

I am genuinely sobbing about Alan the retired oil executive's plight.